package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.BaseException;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.IUserService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sky.utils.HttpClientUtil;
import com.sky.vo.UserLoginVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * <p>
 * 用户信息 服务实现类
 * </p>
 *
 * @author chensheng
 * @since 2025-08-08
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    private static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    /**
     * 微信登录
     *
     * @param uDTO
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO uDTO) {
        String openid = getOpenid(uDTO.getCode());
        //判断openid是否为空，如果为空表示当前登录失败，抛出业务异常
        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户，如果是新用户，自动完成注册
        User user = userMapper.getByOpenidUser(openid);
        if (user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        //返回这个用户对象

        return user;
    }

    private String getOpenid(String code){
        //调用微信接口服务，获得当前微信用户的openid
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSONObject.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
